Reverting stray commit part II, r8156 had the base64 export patch mixed with the nutdec patch

Originally committed as revision 8158 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/http.c

+/*
+ * HTTP protocol for ffmpeg client
+ * Copyright (c) 2000, 2001 Fabrice Bellard.
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include "avformat.h"
+#include <unistd.h>
+#include "network.h"
+
+#include "base64.h"
+
+/* XXX: POST protocol is not completly implemented because ffmpeg use
+   only a subset of it */
+
+//#define DEBUG
+
+/* used for protocol handling */
+#define BUFFER_SIZE 1024
+#define URL_SIZE    4096
+#define MAX_REDIRECTS 8
+
+typedef struct {
+    URLContext *hd;
+    unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
+    int line_count;
+    int http_code;
+    offset_t off, filesize;
+    char location[URL_SIZE];
+} HTTPContext;
+
+static int http_connect(URLContext *h, const char *path, const char *hoststr,
+                        const char *auth, int *new_location);
+static int http_write(URLContext *h, uint8_t *buf, int size);
+
+
+/* return non zero if error */
+static int http_open_cnx(URLContext *h)
+{
+    const char *path, *proxy_path;
+    char hostname[1024], hoststr[1024];
+    char auth[1024];
+    char path1[1024];
+    char buf[1024];
+    int port, use_proxy, err, location_changed = 0, redirects = 0;
+    HTTPContext *s = h->priv_data;
+    URLContext *hd = NULL;
+
+    proxy_path = getenv("http_proxy");
+    use_proxy = (proxy_path != NULL) && !getenv("no_proxy") &&
+        strstart(proxy_path, "http://", NULL);
+
+    /* fill the dest addr */
+ redo:
+    /* needed in any case to build the host string */
+    url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
+              path1, sizeof(path1), s->location);
+    if (port > 0) {
+        snprintf(hoststr, sizeof(hoststr), "%s:%d", hostname, port);
+    } else {
+        pstrcpy(hoststr, sizeof(hoststr), hostname);
+    }
+
+    if (use_proxy) {
+        url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
+                  NULL, 0, proxy_path);
+        path = s->location;
+    } else {
+        if (path1[0] == '\0')
+            path = "/";
+        else
+            path = path1;
+    }
+    if (port < 0)
+        port = 80;
+
+    snprintf(buf, sizeof(buf), "tcp://%s:%d", hostname, port);
+    err = url_open(&hd, buf, URL_RDWR);
+    if (err < 0)
+        goto fail;
+
+    s->hd = hd;
+    if (http_connect(h, path, hoststr, auth, &location_changed) < 0)
+        goto fail;
+    if (s->http_code == 303 && location_changed == 1) {
+        /* url moved, get next */
+        url_close(hd);
+        if (redirects++ >= MAX_REDIRECTS)
+            return AVERROR_IO;
+        location_changed = 0;
+        goto redo;
+    }
+    return 0;
+ fail:
+    if (hd)
+        url_close(hd);
+    return AVERROR_IO;
+}
+
+static int http_open(URLContext *h, const char *uri, int flags)
+{
+    HTTPContext *s;
+    int ret;
+
+    h->is_streamed = 1;
+
+    s = av_malloc(sizeof(HTTPContext));
+    if (!s) {
+        return AVERROR(ENOMEM);
+    }
+    h->priv_data = s;
+    s->filesize = -1;
+    s->off = 0;
+    pstrcpy (s->location, URL_SIZE, uri);
+
+    ret = http_open_cnx(h);
+    if (ret != 0)
+        av_free (s);
+    return ret;
+}
+static int http_getc(HTTPContext *s)
+{
+    int len;
+    if (s->buf_ptr >= s->buf_end) {
+        len = url_read(s->hd, s->buffer, BUFFER_SIZE);
+        if (len < 0) {
+            return AVERROR_IO;
+        } else if (len == 0) {
+            return -1;
+        } else {
+            s->buf_ptr = s->buffer;
+            s->buf_end = s->buffer + len;
+        }
+    }
+    return *s->buf_ptr++;
+}
+
+static int process_line(URLContext *h, char *line, int line_count,
+                        int *new_location)
+{
+    HTTPContext *s = h->priv_data;
+    char *tag, *p;
+
+    /* end of header */
+    if (line[0] == '\0')
+        return 0;
+
+    p = line;
+    if (line_count == 0) {
+        while (!isspace(*p) && *p != '\0')
+            p++;
+        while (isspace(*p))
+            p++;
+        s->http_code = strtol(p, NULL, 10);
+#ifdef DEBUG
+        printf("http_code=%d\n", s->http_code);
+#endif
+    } else {
+        while (*p != '\0' && *p != ':')
+            p++;
+        if (*p != ':')
+            return 1;
+
+        *p = '\0';
+        tag = line;
+        p++;
+        while (isspace(*p))
+            p++;
+        if (!strcmp(tag, "Location")) {
+            strcpy(s->location, p);
+            *new_location = 1;
+        } else if (!strcmp (tag, "Content-Length") && s->filesize == -1) {
+            s->filesize = atoll(p);
+        } else if (!strcmp (tag, "Content-Range")) {
+            /* "bytes $from-$to/$document_size" */
+            const char *slash;
+            if (!strncmp (p, "bytes ", 6)) {
+                p += 6;
+                s->off = atoll(p);
+                if ((slash = strchr(p, '/')) && strlen(slash) > 0)
+                    s->filesize = atoll(slash+1);
+            }
+            h->is_streamed = 0; /* we _can_ in fact seek */
+        }
+    }
+    return 1;
+}
+
+static int http_connect(URLContext *h, const char *path, const char *hoststr,
+                        const char *auth, int *new_location)
+{
+    HTTPContext *s = h->priv_data;
+    int post, err, ch;
+    char line[1024], *q;
+    char *auth_b64;
+    offset_t off = s->off;
+
+
+    /* send http header */
+    post = h->flags & URL_WRONLY;
+
+    auth_b64 = av_base64_encode((uint8_t *)auth, strlen(auth));
+    snprintf(s->buffer, sizeof(s->buffer),
+             "%s %s HTTP/1.1\r\n"
+             "User-Agent: %s\r\n"
+             "Accept: */*\r\n"
+             "Range: bytes=%"PRId64"-\r\n"
+             "Host: %s\r\n"
+             "Authorization: Basic %s\r\n"
+             "\r\n",
+             post ? "POST" : "GET",
+             path,
+             LIBAVFORMAT_IDENT,
+             s->off,
+             hoststr,
+             auth_b64);
+
+    av_freep(&auth_b64);
+    if (http_write(h, s->buffer, strlen(s->buffer)) < 0)
+        return AVERROR_IO;
+
+    /* init input buffer */
+    s->buf_ptr = s->buffer;
+    s->buf_end = s->buffer;
+    s->line_count = 0;
+    s->off = 0;
+    if (post) {
+        sleep(1);
+        return 0;
+    }
+
+    /* wait for header */
+    q = line;
+    for(;;) {
+        ch = http_getc(s);
+        if (ch < 0)
+            return AVERROR_IO;
+        if (ch == '\n') {
+            /* process line */
+            if (q > line && q[-1] == '\r')
+                q--;
+            *q = '\0';
+#ifdef DEBUG
+            printf("header='%s'\n", line);
+#endif
+            err = process_line(h, line, s->line_count, new_location);
+            if (err < 0)
+                return err;
+            if (err == 0)
+                break;
+            s->line_count++;
+            q = line;
+        } else {
+            if ((q - line) < sizeof(line) - 1)
+                *q++ = ch;
+        }
+    }
+
+    return (off == s->off) ? 0 : -1;
+}
+
+
+static int http_read(URLContext *h, uint8_t *buf, int size)
+{
+    HTTPContext *s = h->priv_data;
+    int len;
+
+    /* read bytes from input buffer first */
+    len = s->buf_end - s->buf_ptr;
+    if (len > 0) {
+        if (len > size)
+            len = size;
+        memcpy(buf, s->buf_ptr, len);
+        s->buf_ptr += len;
+    } else {
+        len = url_read(s->hd, buf, size);
+    }
+    if (len > 0)
+        s->off += len;
+    return len;
+}
+
+/* used only when posting data */
+static int http_write(URLContext *h, uint8_t *buf, int size)
+{
+    HTTPContext *s = h->priv_data;
+    return url_write(s->hd, buf, size);
+}
+
+static int http_close(URLContext *h)
+{
+    HTTPContext *s = h->priv_data;
+    url_close(s->hd);
+    av_free(s);
+    return 0;
+}
+
+static offset_t http_seek(URLContext *h, offset_t off, int whence)
+{
+    HTTPContext *s = h->priv_data;
+    URLContext *old_hd = s->hd;
+    offset_t old_off = s->off;
+
+    if (whence == AVSEEK_SIZE)
+        return s->filesize;
+    else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed)
+        return -1;
+
+    /* we save the old context in case the seek fails */
+    s->hd = NULL;
+    if (whence == SEEK_CUR)
+        off += s->off;
+    else if (whence == SEEK_END)
+        off += s->filesize;
+    s->off = off;
+
+    /* if it fails, continue on old connection */
+    if (http_open_cnx(h) < 0) {
+        s->hd = old_hd;
+        s->off = old_off;
+        return -1;
+    }
+    url_close(old_hd);
+    return off;
+}
+
+URLProtocol http_protocol = {
+    "http",
+    http_open,
+    http_read,
+    http_write,
+    http_seek,
+    http_close,
+};

libavutil/Makefile

+include ../config.mak
+
+OBJS= mathematics.o \
+      rational.o \
+      intfloat_readwrite.o \
+      crc.o \
+      md5.o \
+      lls.o \
+      adler32.o \
+      log.o \
+      mem.o \
+      fifo.o \
+      tree.o \
+      lzo.o \
+      random.o \
+      aes.o \
+      base64.o \
+
+HEADERS = avutil.h common.h mathematics.h integer.h rational.h \
+          intfloat_readwrite.h md5.h adler32.h log.h fifo.h lzo.h \
+          random.h
+
+NAME=avutil
+LIBVERSION=$(LAVUVERSION)
+LIBMAJOR=$(LAVUMAJOR)
+
+include ../common.mak

libavutil/avutil.h

+/*
+ * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_H
+#define AVUTIL_H
+
+/**
+ * @file avutil.h
+ * external api header.
+ */
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define AV_STRINGIFY(s)         AV_TOSTRING(s)
+#define AV_TOSTRING(s) #s
+
+#define LIBAVUTIL_VERSION_INT   ((49<<16)+(3<<8)+0)
+#define LIBAVUTIL_VERSION       49.3.0
+#define LIBAVUTIL_BUILD         LIBAVUTIL_VERSION_INT
+
+#define LIBAVUTIL_IDENT         "Lavu" AV_STRINGIFY(LIBAVUTIL_VERSION)
+
+
+#include "common.h"
+#include "mathematics.h"
+#include "rational.h"
+#include "integer.h"
+#include "intfloat_readwrite.h"
+#include "log.h"
+
+/**
+ * Pixel format. Notes:
+ *
+ * PIX_FMT_RGB32 is handled in an endian-specific manner. A RGBA
+ * color is put together as:
+ *  (A << 24) | (R << 16) | (G << 8) | B
+ * This is stored as BGRA on little endian CPU architectures and ARGB on
+ * big endian CPUs.
+ *
+ * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
+ * image data is stored in AVFrame.data[0]. The palette is transported in
+ * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
+ * formatted the same as in PIX_FMT_RGB32 described above (i.e., it is
+ * also endian-specific). Note also that the individual RGB palette
+ * components stored in AVFrame.data[1] should be in the range 0..255.
+ * This is important as many custom PAL8 video codecs that were designed
+ * to run on the IBM VGA graphics adapter use 6-bit palette components.
+ */
+enum PixelFormat {
+    PIX_FMT_NONE= -1,
+    PIX_FMT_YUV420P,   ///< Planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
+    PIX_FMT_YUYV422,   ///< Packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
+    PIX_FMT_RGB24,     ///< Packed RGB 8:8:8, 24bpp, RGBRGB...
+    PIX_FMT_BGR24,     ///< Packed RGB 8:8:8, 24bpp, BGRBGR...
+    PIX_FMT_YUV422P,   ///< Planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
+    PIX_FMT_YUV444P,   ///< Planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
+    PIX_FMT_RGB32,     ///< Packed RGB 8:8:8, 32bpp, (msb)8A 8R 8G 8B(lsb), in cpu endianness
+    PIX_FMT_YUV410P,   ///< Planar YUV 4:1:0,  9bpp, (1 Cr & Cb sample per 4x4 Y samples)
+    PIX_FMT_YUV411P,   ///< Planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
+    PIX_FMT_RGB565,    ///< Packed RGB 5:6:5, 16bpp, (msb)   5R 6G 5B(lsb), in cpu endianness
+    PIX_FMT_RGB555,    ///< Packed RGB 5:5:5, 16bpp, (msb)1A 5R 5G 5B(lsb), in cpu endianness most significant bit to 0
+    PIX_FMT_GRAY8,     ///<        Y        ,  8bpp
+    PIX_FMT_MONOWHITE, ///<        Y        ,  1bpp, 1 is white
+    PIX_FMT_MONOBLACK, ///<        Y        ,  1bpp, 0 is black
+    PIX_FMT_PAL8,      ///< 8 bit with PIX_FMT_RGB32 palette
+    PIX_FMT_YUVJ420P,  ///< Planar YUV 4:2:0, 12bpp, full scale (jpeg)
+    PIX_FMT_YUVJ422P,  ///< Planar YUV 4:2:2, 16bpp, full scale (jpeg)
+    PIX_FMT_YUVJ444P,  ///< Planar YUV 4:4:4, 24bpp, full scale (jpeg)
+    PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
+    PIX_FMT_XVMC_MPEG2_IDCT,
+    PIX_FMT_UYVY422,   ///< Packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
+    PIX_FMT_UYYVYY411, ///< Packed YUV 4:1:1, 12bpp, Cb Y0 Y1 Cr Y2 Y3
+    PIX_FMT_BGR32,     ///< Packed RGB 8:8:8, 32bpp, (msb)8A 8B 8G 8R(lsb), in cpu endianness
+    PIX_FMT_BGR565,    ///< Packed RGB 5:6:5, 16bpp, (msb)   5B 6G 5R(lsb), in cpu endianness
+    PIX_FMT_BGR555,    ///< Packed RGB 5:5:5, 16bpp, (msb)1A 5B 5G 5R(lsb), in cpu endianness most significant bit to 1
+    PIX_FMT_BGR8,      ///< Packed RGB 3:3:2,  8bpp, (msb)2B 3G 3R(lsb)
+    PIX_FMT_BGR4,      ///< Packed RGB 1:2:1,  4bpp, (msb)1B 2G 1R(lsb)
+    PIX_FMT_BGR4_BYTE, ///< Packed RGB 1:2:1,  8bpp, (msb)1B 2G 1R(lsb)
+    PIX_FMT_RGB8,      ///< Packed RGB 3:3:2,  8bpp, (msb)2R 3G 3B(lsb)
+    PIX_FMT_RGB4,      ///< Packed RGB 1:2:1,  4bpp, (msb)2R 3G 3B(lsb)
+    PIX_FMT_RGB4_BYTE, ///< Packed RGB 1:2:1,  8bpp, (msb)2R 3G 3B(lsb)
+    PIX_FMT_NV12,      ///< Planar YUV 4:2:0, 12bpp, 1 plane for Y and 1 for UV
+    PIX_FMT_NV21,      ///< as above, but U and V bytes are swapped
+
+    PIX_FMT_RGB32_1,   ///< Packed RGB 8:8:8, 32bpp, (msb)8R 8G 8B 8A(lsb), in cpu endianness
+    PIX_FMT_BGR32_1,   ///< Packed RGB 8:8:8, 32bpp, (msb)8B 8G 8R 8A(lsb), in cpu endianness
+
+    PIX_FMT_GRAY16BE,  ///<        Y        , 16bpp, big-endian
+    PIX_FMT_GRAY16LE,  ///<        Y        , 16bpp, little-endian
+    PIX_FMT_NB,        ///< number of pixel formats, DO NOT USE THIS if you want to link with shared libav* because the number of formats might differ between versions
+};
+
+#ifdef WORDS_BIGENDIAN
+#define PIX_FMT_RGBA PIX_FMT_RGB32_1
+#define PIX_FMT_BGRA PIX_FMT_BGR32_1
+#define PIX_FMT_ARGB PIX_FMT_RGB32
+#define PIX_FMT_ABGR PIX_FMT_BGR32
+#define PIX_FMT_GRAY16 PIX_FMT_GRAY16BE
+#else
+#define PIX_FMT_RGBA PIX_FMT_BGR32
+#define PIX_FMT_BGRA PIX_FMT_RGB32
+#define PIX_FMT_ARGB PIX_FMT_BGR32_1
+#define PIX_FMT_ABGR PIX_FMT_RGB32_1
+#define PIX_FMT_GRAY16 PIX_FMT_GRAY16LE
+#endif
+
+#if LIBAVUTIL_VERSION_INT < (50<<16)
+#define PIX_FMT_UYVY411 PIX_FMT_UYYVYY411
+#define PIX_FMT_RGBA32  PIX_FMT_RGB32
+#define PIX_FMT_YUV422  PIX_FMT_YUYV422
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* AVUTIL_H */

libavutil/base64.c

+/*
+ * Base64.c
+ * Copyright (c) 2006 Ryan Martell. (rdm4@martellventures.com)
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+* @file base64.c
+ * @brief Base64 Encode/Decode
+ * @author Ryan Martell <rdm4@martellventures.com> (with lots of Michael)
+ */
+
+#include "common.h"
+#include "base64.h"
+
+/* ---------------- private code */
+static uint8_t map2[] =
+{
+    0x3e, 0xff, 0xff, 0xff, 0x3f, 0x34, 0x35, 0x36,
+    0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x01,
+    0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
+    0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11,
+    0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1a, 0x1b,
+    0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23,
+    0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b,
+    0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33
+};
+
+int av_base64_decode(uint8_t * out, const char *in, int out_length)
+{
+    int i, v;
+    uint8_t *dst = out;
+
+    v = 0;
+    for (i = 0; in[i] && in[i] != '='; i++) {
+        unsigned int index= in[i]-43;
+        if (index>=(sizeof(map2)/sizeof(map2[0])) || map2[index] == 0xff)
+            return -1;
+        v = (v << 6) + map2[index];
+        if (i & 3) {
+            if (dst - out < out_length) {
+                *dst++ = v >> (6 - 2 * (i & 3));
+            }
+        }
+    }
+
+    return (dst - out);
+}
+
+/*****************************************************************************
+* b64_encode: stolen from VLC's http.c
+* simplified by michael
+* fixed edge cases and made it work from data (vs. strings) by ryan.
+*****************************************************************************/
+
+char *av_base64_encode(uint8_t * src, int len)
+{
+    static const char b64[] =
+        "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+    char *ret, *dst;
+    unsigned i_bits = 0;
+    int i_shift = 0;
+    int bytes_remaining = len;
+
+    if (len < UINT_MAX / 4) {
+        ret = dst = av_malloc(len * 4 / 3 + 12);
+    } else
+        return NULL;
+
+    if (len) {                  // special edge case, what should we really do here?
+        while (bytes_remaining) {
+            i_bits = (i_bits << 8) + *src++;
+            bytes_remaining--;
+            i_shift += 8;
+
+            do {
+                *dst++ = b64[(i_bits << 6 >> i_shift) & 0x3f];
+                i_shift -= 6;
+            } while (i_shift > 6 || (bytes_remaining == 0 && i_shift > 0));
+        }
+        while ((dst - ret) & 3)
+            *dst++ = '=';
+    }
+    *dst = '\0';
+
+    return ret;
+}
+
+// #define TEST_BASE64
+
+#ifdef TEST_BASE64
+#include "avutil.h"
+
+int b64test()
+{
+    int numerr = 0;
+    int len;
+    int numtest = 1;
+    uint8_t decode[1000];
+    struct test {
+        void *data;
+        int len;
+        const char *result;
+    } *t, tests[] = {
+        {
+        "", 0, ""}, {
+        "1", 1, "MQ=="}, {
+        "22", 2, "MjI="}, {
+        "333", 3, "MzMz"}, {
+        "4444", 4, "NDQ0NA=="}, {
+        "55555", 5, "NTU1NTU="}, {
+        "abc:def", 7, "YWJjOmRlZg=="}, {
+        NULL}
+    };
+    for (t = tests; t->data; t++) {
+        char *str;
+
+        av_log(NULL, AV_LOG_ERROR, "Encoding %s...\n", (char *) t->data);
+        str = av_base64_encode(t->data, t->len);
+        if (str) {
+            av_log(NULL, AV_LOG_ERROR, "Encoded to %s...\n", str);
+            if (strcmp(str, t->result) != 0) {
+                av_log(NULL, AV_LOG_ERROR, "failed test %d: %s != %s\n",
+                       numtest, str, t->result);
+                numerr++;
+            }
+            av_free(str);
+        }
+
+        av_log(NULL, AV_LOG_ERROR, "Done encoding, about to decode...\n");
+        len = av_base64_decode(decode, t->result, sizeof(decode));
+        if (len != t->len) {
+            av_log(NULL, AV_LOG_ERROR, "failed test %d: len %d != %d\n",
+                   numtest, len, t->len);
+            numerr++;
+        } else if (memcmp(decode, t->data, t->len) != 0) {
+            av_log(NULL, AV_LOG_ERROR, "failed test %d: data\n", numtest);
+            numerr++;
+        } else {
+            av_log(NULL, AV_LOG_ERROR, "Decoded to %s\n",
+                   (char *) t->data);
+        }
+        numtest++;
+    }
+
+#undef srand
+#undef rand
+
+    {
+        int test_count;
+        srand(123141);          // time(NULL));
+        for (test_count = 0; test_count < 100; test_count++) {
+            int size = rand() % 1024;
+            int ii;
+            uint8_t *data;
+            char *encoded_result;
+
+            av_log(NULL, AV_LOG_ERROR, "Test %d: Size %d bytes...",
+                   test_count, size);
+            data = (uint8_t *) av_malloc(size);
+            for (ii = 0; ii < size; ii++) {
+                data[ii] = rand() % 255;
+            }
+
+            encoded_result = av_base64_encode(data, size);
+            if (encoded_result) {
+                int decode_buffer_size = size + 10;     // try without 10 as well
+                uint8_t *decode_buffer = av_malloc(decode_buffer_size);
+                if (decode_buffer) {
+                    int decoded_size =
+                        av_base64_decode(decode_buffer, encoded_result,
+                                   decode_buffer_size);
+
+                    if (decoded_size != size) {
+                        av_log(NULL, AV_LOG_ERROR,
+                               "Decoded/Encoded size mismatch (%d != %d)\n",
+                               decoded_size, size);
+                    } else {
+                        if (memcmp(decode_buffer, data, decoded_size) == 0) {
+                            av_log(NULL, AV_LOG_ERROR, "Passed!\n");
+                        } else {
+                            av_log(NULL, AV_LOG_ERROR,
+                                   "Failed (Data differs)!\n");
+                        }
+                    }
+                    av_free(decode_buffer);
+                }
+
+                av_free(encoded_result);
+            }
+        }
+    }
+
+    // these are invalid strings, that it currently decodes (which it probably shouldn't?)
+    {
+        uint8_t str[32];
+        if (av_base64_decode(str, "M=M=", sizeof(str)) != -1) {
+            av_log(NULL, AV_LOG_ERROR,
+                   "failed test %d: successful decode of `M=M='\n",
+                   numtest++);
+            numerr++;
+        }
+        if (av_base64_decode(str, "MQ===", sizeof(str)) != -1) {
+            av_log(NULL, AV_LOG_ERROR,
+                   "failed test %d: successful decode of `MQ==='\n",
+                   numtest++);
+            numerr++;
+        }
+    }
+
+    return numerr;
+}
+#endif
+

libavutil/base64.h

+/*
+ * Base64.c
+ * Copyright (c) 2006 Ryan Martell. (rdm4@martellventures.com)
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * decodes base64
+ * param order as strncpy()
+ */
+int av_base64_decode(uint8_t * out, const char *in, int out_length);
+
+/**
+ * encodes base64
+ * @param src data, not a string
+ */
+char *av_base64_encode(uint8_t * src, int len);
+